EP0494557A1 - Druckbegrenzungsvorrichtung - Google Patents

Druckbegrenzungsvorrichtung Download PDF

Info

Publication number
EP0494557A1
EP0494557A1 EP91403402A EP91403402A EP0494557A1 EP 0494557 A1 EP0494557 A1 EP 0494557A1 EP 91403402 A EP91403402 A EP 91403402A EP 91403402 A EP91403402 A EP 91403402A EP 0494557 A1 EP0494557 A1 EP 0494557A1
Authority
EP
European Patent Office
Prior art keywords
spring
valve
plug
valves
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91403402A
Other languages
English (en)
French (fr)
Other versions
EP0494557B1 (de
Inventor
Edmond Faubeau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Forges de Belles Ondes
Original Assignee
Forges de Belles Ondes
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Forges de Belles Ondes filed Critical Forges de Belles Ondes
Publication of EP0494557A1 publication Critical patent/EP0494557A1/de
Application granted granted Critical
Publication of EP0494557B1 publication Critical patent/EP0494557B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
    • B61F5/14—Side bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
    • B60G17/056—Regulating distributors or valves for hydropneumatic systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/18—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on either side
    • F16K17/19—Equalising valves predominantly for tanks
    • F16K17/196—Equalising valves predominantly for tanks spring-loaded

Definitions

  • the present invention relates to a pressure limiting device intended to maintain pressure balancing between two closed pressurized chambers. Such a device is mounted between the pressurized gas supplies of the two chambers.
  • Such a device is, in particular, used in the suspension systems of railway wagons comprising air cushions.
  • the device is mounted between the air cushions located on the right and on the left, at the same end of the wagon, so as to maintain a practically identical pressure in the two cushions. This avoids any risk of the wagon body tilting over the bogies.
  • a pressure limiting device constituted by a casing comprising two intake pipes connected to each other by two valves arranged in parallel and mounted in opposition, each of the two pipes being connected to one of the two pressure vessels to be balanced ; each valve has a movable valve resting on a fixed seat and supported on this seat by a calibrated spring.
  • the two valves are mounted in opposition so that an overpressure in a first pipe causes the opening of a first valve and that an overpressure in the second pipe causes the opening of the other valve, the opening of the one or the other of the valves putting the two pipes in communication and, consequently, ensuring the equalization of the pressures in the two pipes and in the two pressure vessels to which they are connected.
  • the overpressure ⁇ P necessary to cause the opening of a valve is determined by the force opposed by the spring pressing the movable valve on its fixed seat.
  • This device therefore limits the pressure in one cushion compared to that existing in the other air cushion.
  • This limitation makes it possible to limit the canting of the wagon in the event of an operating incident during which the leveling valve which supplies an air cushion continues to supply said cushion while its exhaust is blocked, and where , therefore, the pressure would increase beyond what is necessary to balance.
  • the pressure must therefore not exceed that of the other cushion by a value greater than ⁇ P, chosen according to the shape and weight of the wagon.
  • the object of the present invention is to provide a pressure limiting device making it possible to avoid these drawbacks by providing in the device a device for adjusting the force of the spring by compressing it. It is thus possible to adjust the force of the spring during the mounting of the pressure limiting device and / or during use to compensate for the fatigue of the metal.
  • the present invention therefore relates to a pressure relief device consisting by a casing comprising two intake pipes connected together by two valves each comprising a valve, which is pushed against a fixed seat by means of a spring, one end of which bears on the valve, the two valves being mounted in parallel and in opposition between the two pipes so that an overpressure in the first pipe causes the opening of a first valve and that an overpressure in the second pipe causes the opening of the second valve, the opening of one or the other of the valves connecting the two pipes, the opening overpressures of the two valves being substantially equal, characterized in that in each valve the spring is supported, by its end opposite to that which acts on the valve, on an adjustment device making it possible to modify the compression of said spring.
  • the adjustment device is preferably constituted by a plug which can be moved in translation along the axis of the spring until it occupies a position in which the compression of the spring corresponds to the desired force of said spring.
  • the translation of the plug is advantageously obtained by screwing said plug into an element of the wall of the envelope of the pressure equalizing device.
  • a locking device When the plug has reached the position corresponding to the desired compression of the spring, it is preferably held in place by a locking device; said device is preferably constituted by a slot and pin system, which in the case where the cap is screwed, prevents any rotation of the cap after adjustment: this device can comprise on the one hand, at least one slot formed on the outer edge of the plug and, on the other hand, a locking pin passing through a housing made in the element where the plug is screwed, said pin being capable of being inserted, after adjustment, into a slot in the plug to ensure its blocking.
  • the plug has several slots cooperating with a single pin housing formed in the element of the envelope, where the plug is screwed: by introducing the pin, through the housing in the slot, it is blocked cap.
  • the element of the envelope comprises several housings and the plug, one or more slots. It is obvious that the adjustment of the compression of the spring is all the more precise the higher the number of slots and / or housings.
  • the pressure limiting device is designated as a whole by the reference 1. It consists of an envelope 2 carrying two intake pipes 3 a and 3 b and two elements forming annular projections 15 a and 15 b ; the annular projections 15 a , 15 b each have a cylindrical radial housing, 28 a - 28 b respectively, into which a pin 29 a , 29 b can be inserted, consisting of a finger formed by radially bending a free end of a ring elastic cut into metal, the ring being fixed in a corresponding groove of the two elements forming annular projections 15 to 15 b .
  • the pipes 3 a , 3 b are intended to receive in sealed manner the ends of the compressed air pipes, the pressures of which are to be equalized.
  • the two pipes 3 a and 3 b have parallel axes and extend in the casing 2 to form two separate spaces E1, E2.
  • the casing 2 contains two valves 4 a and 4 b , which respectively have a plug 5 a , 5 b , a spring 6 a , 6 b and a movable valve 7 a , 7 b .
  • the spaces E1 and E2 of the envelope 2 are separated by a partition 8 forming an integral part of the wall of the envelope 2; in this partition are formed two circular openings 9 a , 9 b ; the edge of these openings 9 a , 9 b is machined on one of its faces, so as to serve as a seat for the valves 7 a and 7 b respectively.
  • the valves 4 a , 4 b have their axes perpendicular to the mean plane of the partition 8 and are mounted head to tail, on either side of said mean plane.
  • valve 7 a of the valve 4 a is composed of a disc 10 a provided, on its face which comes to bear on the seat, with an annular groove 11 a in which is placed an O-ring seal 12 a .
  • the face of the disc 10 a opposite the seat carries a valve stem 13 a which is hollow and the axial channel of which communicates through an opening 14 a with the space E1 so that the pressure of the tube 3 a is established in the channel 25 a where moves said valve stem; in this way, if the pressures in the spaces E1, and E2 are equal, the valve is not subjected to any pressing force against its seat other than that generated by the spring 6 a .
  • Spring 6 a is a spring helical held between the disc 10 a and the plug 5 a .
  • the plug 5 a is threaded and screwed into the annular projection 15 a of the casing 2.
  • the internal cylindrical wall of this projection has two zones: a thread zone 16 a in its outermost part and a smooth zone 17 a of smaller diameter in its part opening in space E1.
  • the plug 5 a has a generally cylindrical external shape of dimension and shape such that it can be introduced into the annular projection 15 a ; its outer wall has a threaded area 18 a of larger diameter capable of cooperating with the threaded area 16 a of the annular projection 15 a and a smooth area 19 a in which is formed an annular groove 20 a containing an O-ring seal 21 a .
  • a cylindrical cavity 22 has the depth of which is less than the height of the threaded portion 18a, the cavity 22 was being bordered by a ring 23 a.
  • this ring 23a are provided six radial slots 24a having a depth less than the height of the ring 23 a.
  • the plug In its part facing the space E1, the plug is pierced with an axial channel 25 a whose inner wall is extended by that of a cylindrical skirt 26 a .
  • the channel 25 has dimensions such that the valve stem 13 a can slide freely inside; a cylindrical bush arranged between the skirt 26a and the rod 13a serves to guide the translation of the valve relative to the plug.
  • a circular groove 27 a is formed in the plug around the skirt 26 a : the spring 6 a is disposed in this groove 27 a and consequently surrounds the skirt 26 a , which constitutes for it an axial guide.
  • the pressure relief device 1 operates in the manner described below. If there exists in the tubing 3 b and, consequently in the space E une, a overpressure generating on the valve 7 has a force greater than the force of the spring 6 a of the valve 4 a , the valve 7 a is pushed back and the communication between the spaces E1 and E2 is established. When the overpressure has a value less than the force of the spring 6 a , the valve 7 a comes back into place against its seat under the action of the spring 6 a .
  • the adjustment of the spring 6 a according to the invention is simple. Is established in the space E2 a pressure equal to the overpressure for which it is desired that the valve 7 a opens, the space E1 being at atmospheric pressure and the plug 5 a is screwed until the spring 6 has reaches compression giving it a force ensuring closure of the valve. The plug 5 a is then blocked by inserting the finger of the ring 29 a into the opening 28 a of the annular projection 15 a and into the slot 24 a located opposite or in the vicinity of this opening 28 a .
  • the plug 5 a has six slots 24 a and the annular projection 15 has a single opening 28 a . It is obvious that the annular projection could have several openings, the number of slots being the same or different; one can thus make the adjustment of the compression of the spring more accurate by increasing the number of slots 24 a and / or the number of openings 28 a.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Safety Valves (AREA)
EP19910403402 1990-12-31 1991-12-16 Druckbegrenzungsvorrichtung Expired - Lifetime EP0494557B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9016537A FR2671157B1 (fr) 1990-12-31 1990-12-31 Appareil limiteur de pression.
FR9016537 1990-12-31

Publications (2)

Publication Number Publication Date
EP0494557A1 true EP0494557A1 (de) 1992-07-15
EP0494557B1 EP0494557B1 (de) 1995-08-02

Family

ID=9403874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910403402 Expired - Lifetime EP0494557B1 (de) 1990-12-31 1991-12-16 Druckbegrenzungsvorrichtung

Country Status (4)

Country Link
EP (1) EP0494557B1 (de)
CA (1) CA2058599A1 (de)
DE (1) DE69111783T2 (de)
FR (1) FR2671157B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995028588A1 (de) * 1994-04-15 1995-10-26 Ina Wälzlager Schaeffler Kg Vordruckventil einer hydraulischen kupplungsbetätigungseinrichtung
US6872684B2 (en) 2003-03-31 2005-03-29 Sud Chemie Mt S.R.I. Catalysts for oxychlorination of ethylene to 1,2-dichloroethane
EP1975481A2 (de) * 2007-03-27 2008-10-01 Volvo Construction Equipment Holding Sweden AB Ablassventil für Baumaschinen
CN102661411A (zh) * 2012-04-23 2012-09-12 盛虎 一种太阳能热水器的双向换气装置
US20210293212A1 (en) * 2020-03-20 2021-09-23 Eaton Intelligent Power Limited Pilot valve for pressure relief valve

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2028755A (en) * 1934-10-18 1936-01-28 John D Crecca Breather valve
US2351874A (en) * 1942-05-20 1944-06-20 Parker Appliance Co Relief valve for fuel tanks
CH326823A (de) * 1955-02-04 1957-12-31 Theodor Bell & Cie Ag Druckausgleichsanordnung, insbesondere als Entlüftungs- und Belüftungsventil für Brennstoffbehälter
US4090545A (en) * 1977-03-16 1978-05-23 Caterpillar Tractor Co. Nut locking means
WO1989002047A1 (en) * 1987-08-31 1989-03-09 Svahn, Ove A valve device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2028755A (en) * 1934-10-18 1936-01-28 John D Crecca Breather valve
US2351874A (en) * 1942-05-20 1944-06-20 Parker Appliance Co Relief valve for fuel tanks
CH326823A (de) * 1955-02-04 1957-12-31 Theodor Bell & Cie Ag Druckausgleichsanordnung, insbesondere als Entlüftungs- und Belüftungsventil für Brennstoffbehälter
US4090545A (en) * 1977-03-16 1978-05-23 Caterpillar Tractor Co. Nut locking means
WO1989002047A1 (en) * 1987-08-31 1989-03-09 Svahn, Ove A valve device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995028588A1 (de) * 1994-04-15 1995-10-26 Ina Wälzlager Schaeffler Kg Vordruckventil einer hydraulischen kupplungsbetätigungseinrichtung
US6872684B2 (en) 2003-03-31 2005-03-29 Sud Chemie Mt S.R.I. Catalysts for oxychlorination of ethylene to 1,2-dichloroethane
EP1975481A2 (de) * 2007-03-27 2008-10-01 Volvo Construction Equipment Holding Sweden AB Ablassventil für Baumaschinen
EP1975481A3 (de) * 2007-03-27 2013-03-13 Volvo Construction Equipment Holding Sweden AB Ablassventil für Baumaschinen
CN102661411A (zh) * 2012-04-23 2012-09-12 盛虎 一种太阳能热水器的双向换气装置
US20210293212A1 (en) * 2020-03-20 2021-09-23 Eaton Intelligent Power Limited Pilot valve for pressure relief valve
US11946438B2 (en) * 2020-03-20 2024-04-02 Eaton Intelligent Power Limited Pilot valve for pressure relief valve

Also Published As

Publication number Publication date
CA2058599A1 (fr) 1992-07-01
DE69111783T2 (de) 1996-04-18
DE69111783D1 (de) 1995-09-07
FR2671157A1 (fr) 1992-07-03
EP0494557B1 (de) 1995-08-02
FR2671157B1 (fr) 1993-10-29

Similar Documents

Publication Publication Date Title
EP0275503A1 (de) Dämpfer mit Lastausgleich
EP0873457B1 (de) Dämpfungsvorrichtung für hoch- und tiefbauelemente
EP0494557B1 (de) Druckbegrenzungsvorrichtung
FR3067437A1 (fr) Gicleur de fluide axial a clapet evente
FR2877743A1 (fr) Dispositif de regulation de debit
FR2841954A1 (fr) Ensemble de suspension pneumatique et de valve pour un systeme de suspension pneumatique combine a un amortisseur
FR2551525A1 (fr) Regulateur de pression a ecoulement axial
EP0214023B1 (de) Durchflussbegrenzungsvorrichtung für einen Hahn einer Flasche für unter Druck stehendes verflüssigtes oder gepresstes Glas
CA1067199A (fr) Dispositif transducteur d'ondes acoustiques a compensation automatique des variations de pression statique
EP0683385A1 (de) Verfahren und Vorrichtung zur Beurteilung der Schubkraft eines Staustrahltriebwerks
FR2609523A1 (fr) Raccord a obturateur pour circuit de fluide
EP0227541A1 (de) Sicherheitsventil mit integrierter Pilotsteuerung
FR2474111A1 (fr) Reservoir de pression
EP0035427B1 (de) Verfahren zur Herstellung eines vorgespannten Druckspeichers und Druckspeicher gemäss diesem Verfahren
FR2935033A1 (fr) Dispositif de compensation du volume du corps d'un amortisseur hydraulique de suspension
EP0100732B1 (de) Einrichtung zur Regelung des Gasflusses für Feuerzeug mit flüssigem Gas
FR3069520A1 (fr) Dispositif de liaison amortie pour navire
EP3308057B1 (de) Druckbegrenzungsvorrichtung, insbesondere für ein hydraulisches hilfssystem für fahrzeuge
EP0610111B1 (de) Flüssigkeitsverteiler Ventil
EP0055187B1 (de) Regulationsventil und Pilotsteuerventil
FR3085238A1 (fr) Dispositif d'etancheite du type presse-etoupe pour un cable electrique
EP1496332B1 (de) Pyrotechnischer Gasgenerator mit regelbarem Gasdruck
EP1655157B1 (de) Aufhängungskugel
FR2610071A1 (fr) Soupape en particulier pour le degazage de reservoirs de carburant de vehicules automobiles
FR2654794A1 (fr) Detendeur neutralisable.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE ES GB IT

17P Request for examination filed

Effective date: 19920826

17Q First examination report despatched

Effective date: 19931029

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE ES GB IT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19950802

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19950802

REF Corresponds to:

Ref document number: 69111783

Country of ref document: DE

Date of ref document: 19950907

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19950830

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19951216

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19951231

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

BERE Be: lapsed

Owner name: FORGES DE BELLES ONDES

Effective date: 19951231

26N No opposition filed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19951216

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19960903